Function output is returning equation not value

Hi guys,

Im fairly new to MATLAB and im sure this is a quick fix...

I made a function to calculate the twist of a beam.

my last line of code is convertinf the answer in rad to degrees.

the fuction returns the devision the last line does not the value of the devision.

when I evaluate I get the correct answer. I want the function to just output the twist angle in deg.

Any ideas?

function P = twist(funky,A,B,G,Rinner,Router)

J = (pi/2)*(Router^4-Rinner^4); %calculate j in m^4

syms x;

t_x = int(funky,0,x);% intergrate internal tourqe function from 0 to x

pretty(t_x) %display intergration in nice format

T = int(t_x,A,B);%calculate intergral of t(x) dx and evaluate from A to B

rad = T/(G*J);% phi equation in rad

P = ((rad)*(180))/(pi);% convert red to deg

end

Answer 1

[Star Strider]

If ‘rad’ is purely numeric (no symbolic variables), use the double function to onvert it to a double value.

Also consider using the rad2deg function, since it is a bit more robust than multiplying by .

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[Jamie Hobbs]

Thanks!

[Star Strider]

My pleasure!

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